Like last week’s announcement that David Letterman was retiring in 2015, yesterday’s news that Stephen Colbert would take over CBS’ Late Show overshadowed Thursday’s primetime as the big action on TV. But that didn’t mean there was a lot going on last night. With its penultimate episode before next week’s Season 3 finale, Scandal (3.0/9) not unexpectedly ramped it up with more tension and potentially explosive outcomes. The Shonda Rhimes-produced drama also bopped up 3% among adults 18-49 compared with last week’s season low. Lead-in Grey’s Anatomy (2.5/8) dipped 7% from its April 3 episode. With Once Upon A Time In Wonderland wrapped up for good last week, ABC kicked off its Thursday primetime with a special Shark Tank (1.6/6). The first of a two-nighter, the entrepreneurial reality series was down 20% from its last regular Friday airing on April 4 but gave ABC a six-month high in adults 18-49 for the 8 PM slot. With a 2.4/8 rating, ABC was tied with CBS for the 18-49 top spot, but the latter finished first in total viewers with 9.76 million.

On CBS, The Big Bang Theory (4.6/7) slipped 6% from last week to tie a season low in preliminary ratings, though the science geek Chuck Lorre comedy was again the night’s highest-rated and most-watched show with a total audience of 15.99 million. The rest of CBS’ night was reasonably steady with The Millers (2.6/9) and Two And A Half Men (2.4/8) dipping 7% and 4%, respectively, from last week. With the heavily promoted first small-screen reunion between Robin Williams and Pam Dawber since one was Mork and the other was Mindy, freshman The Crazy Ones (1.7/5) was even with last week to tie a low. While CBS’ comedies took small hits, it added up well for Elementary (1.7/5) in the end. Closing out CBS’ night, the Sherlock Homes modernization was up 13% over its April 3 episode.

The CW’s Reign was down a whooping 33% from its last original March 27 for a new low for the freshman historical drama.

It was elimination night on American Idol (1.7/5) with the competition show now down to a Final 7. The contestants may have been down but Idol wasn’t: Although it tied a series low, the live half-hour show was even with its April 3 broadcast. Lead-in Hell’s Kitchen (1.4/5) didn’t cook up any solutions for the struggling Idol, with the Gordon Ramsay series down 18% from last week to hit a Season 12 low. In its third week, Surviving Jack was even with its April 3 show.

Its no surprise that NBC’s Thursdays are not strong, and last night that was proven again. Coming off a series low last week, Community (0.8/3) was down 11% to hit a new bottom. Stumbling 9% in the key demo, lead-out Parks And Recreation (1.0/3) tied a series low. With a Hollywood Game Night repeat as its lead-in, an original Parenthood (1.1/3) was down 8% to also tie a series low.